Elements missing in bpmn-js?

In MyEclipse we can design our business flows with the components or service tasks (the left image). And we can also design most of business flows in the JBPM Web designer (the right image), but we can not find the service tasks (the red rectangle in the left image) when we tried all the examples in the github(https://github.com/bpmn-io).

somebody help?

Log, Email and XmlReader are no task types in BPMN 2.0.

You can model all available BPMN symbols in bpmn-js with the exception of Groups.

The stuff is not piled up in a long list though but available via the replace/morph menu on existing elements (the wrench symbol).

Hope that helps!